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#! /usr/bin/perl
# **** License ****
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License version 2 as
# published by the Free Software Foundation.
#
# This program is distributed in the hope that it will be useful, but
# WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
# General Public License for more details.
#
# This code was originally developed by Vyatta, Inc.
# Portions created by Vyatta are Copyright (C) 2007 Vyatta, Inc.
# All Rights Reserved.
#
# Author: Stephen Hemminger
# Date: January 2010
# Description: Script to display SNMP information
#
# **** End License ****
#
use strict;
use warnings;
use Getopt::Long;
use NetAddr::IP;
my $SNMPDCFG = '/etc/snmp/snmpd.conf';
my $SNMPSTATUS = '/usr/bin/snmpstatus';
# generate list of communities in configuration file
sub read_config {
my %community;
open( my $cfg, '<', $SNMPDCFG )
or die "Can't open $SNMPDCFG : $!\n";
while (<$cfg>) {
chomp;
s/#.*$//;
my @cols = split;
next
unless ( $#cols > 0
&& ( $cols[0] eq 'rocommunity' || $cols[0] eq 'rwcommunity' ) );
my $addr = ( $#cols > 1 ) ? $cols[2] : "0.0.0.0/0";
$community{ $cols[1] } = NetAddr::IP->new($addr);
}
close $cfg;
return \%community;
}
# expand list of available communities for allowed: tag
sub show_all {
my $community = read_config();
print join( ' ', keys( %{$community} ) ), "\n";
exit 0;
}
# check status of any accessible community on localhost
sub status_any {
my $cref = read_config();
my %community = %{$cref};
my $localhost = new NetAddr::IP('localhost');
die "No SNMP community's configured\n"
unless scalar(%community);
foreach my $c ( keys %community ) {
my $addr = $community{$c};
status( $c, $localhost->addr() ) if ( $addr->contains($localhost) );
}
die "No SNMP community's accessible from ", $localhost->addr(), "\n";
}
# check status of one community
sub status {
my ( $community, $host ) = @_;
$host = 'localhost' unless defined($host);
print "Status of SNMP community $community on $host\n";
exec $SNMPSTATUS, '-v1', '-c', $community, $host;
die "Can't exec $SNMPSTATUS : $!";
}
sub usage {
print "usage: $0 [--community=name [--host=hostname]]\n";
print " $0 --allowed\n";
exit 1;
}
my ( $host, $community, $allowed );
GetOptions(
"host=s" => \$host,
"community=s" => \$community,
"allowed" => \$allowed,
) or usage();
show_all() if ($allowed);
status( $community, $host ) if ( defined($community) );
status_any();
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